JP2009067667A - Heat resistant laminated glass, and heat resistant laminated glass structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heat resistant laminated glass having excellent various fireproof performances such as heat resistance and heat shieldability, having high mechanical strength performance such as impact resistance and penetration properties, and having lightweightness and high operability, and to provide a heat resistant laminated glass structure using the same. <P>SOLUTION: The heat resistant laminated glass 10 is obtained by laminating three or more plate glasses 20 with a plate thickness of <1 mm via an intervention layer 30 between the respective plate glasses 20. The average linear expansion coefficient in the temperature range of 30 to 380°C in the plate glasses 20 lies in the range of -1×10<SP>-7</SP>/K to 50×10<SP>-7</SP>/K, also the softening point according to JIS R3103-1(2001) in the glass is ≥830°C, the total thickness T of the laminated glass 10 is 1.3 to 10 mm, and the total thickness S of the intervention layer 30 lies in the range of 30 to 60% of the total thickness T of the laminated glass 10. Further, the heat resistant laminated glass structure is obtained by fixing the sides 13 of the heat resistant laminated glass 10 to a frame body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a window material mainly used in buildings and the like, and has high transparency, and further has fire resistance such as fire resistance, heat shielding properties and heat resistance, and crime prevention performance rich in penetration resistance, impact resistance, etc. And a structure using the heat-resistant laminated glass.

  Laminated glass having a laminated structure in which a resin material such as plastic is sandwiched between two sheet glasses is generally used as a window material having penetration resistance and impact resistance, and high security. in use. Since this laminated glass is excellent in mechanical performance such as strength, it has great value as a window material that requires lighting of a building or the like, and is used in many buildings. In addition, since such laminated glass also has a function of protecting against flying objects, it is widely used in in-vehicle applications such as automobiles, and laminated glass articles having many physical additional functions are used in various applications. . On the other hand, such a laminated glass has adhesiveness at the time of lamination, moisture resistance of the resin layer, etc. by adjusting the performance of the resin material inserted between the two glass plates to a desired level. At the same time, attempts have been made to make it easier to construct a laminated structure when producing a laminate.

  In addition, for window materials used in buildings, etc., to prevent rapid fire spread in the event of a fire, etc., to prevent the heated windows from being destroyed and scattered, and to prevent evacuation, or flying objects From the standpoint of preventing the risk of direct damage caused by the use of laminated window glass as a window material. Therefore, many inventions that focus on performance such as fire prevention or heat resistance have been made so far.

For example, Patent Document 1 discloses a composite glass for crime prevention and bulletproof constituted by high-frequency heat-crosslinking an ethylene-vinyl acetate copolymer resin sheet. In Patent Document 2, a borosilicate glass plate glass is used as a window glass for crime prevention, and a copolymer of tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride is used as an intermediate film interposed therebetween. Laminated glass using is disclosed. Further, in Patent Document 3, a laminated type in which a transparent heat-sensitive foaming layer having a foaming property is interposed between two glass sheets, and a tempered glass having a plate-like fracture resistance is incorporated in the center thereof. A refractory glass is disclosed. Further, in Patent Document 4, a laminated glass having a structure in which a plate glass and a resin film are laminated, and an adhesive that is used when the plate glass and the resin film are laminated to reduce the shearing force acting on the plate glass is used. Has also been done.
JP 2003-252658 A JP 2006-96612 A JP-A-6-170998 JP-A-7-138051

  However, the inventions disclosed so far are not sufficient to provide laminated glass that meets various needs. The performance required for window materials used in buildings, etc. has become more diverse than before due to the background of improving security awareness reflecting recent social conditions and dealing with repeated earthquake disasters, etc. ing. In other words, in addition to basic performance such as penetration resistance and impact resistance, it is also excellent in terms of fire resistance such as heat insulation and heat resistance, and sound insulation and heat insulation for constituting an economical living environment, In addition, it is also important that the workability to buildings and the like that are becoming higher-rise is good, and there is a demand for window materials that have high performance and functions and that have high workability.

  In view of the situation, the present invention is excellent in various fireproof performances such as heat resistance and heat shielding properties, in addition to having high mechanical strength performance such as impact properties and penetrability, and more lightweight than conventional laminated glass. Therefore, it is an object to provide a highly versatile laminated glass excellent in workability in a high-rise building and a heat-resistant laminated glass structure using the heat-resistant laminated glass.

  The inventors have made a number of different physical performances, that is, thermal performance such as thermal insulation and mechanical strength performance such as penetrability, and a plurality of high level requests to reduce the weight of the entire laminated glass. While conducting research on satisfactory laminated glass at the same time, it has a specific thermal performance even though it has been difficult to realize when two sheets of glass that have been used in the past are simply combined. It has been found that by laminating three or more sheet glasses having a thickness of less than 1 mm, it is possible to obtain a laminated glass exhibiting stable performance by providing a configuration capable of sufficiently exhibiting a plurality of desired performances. It is to be presented.

That is, the heat-resistant laminated glass of the present invention is a laminated glass in which three or more plate glasses having a plate thickness of less than 1 mm are laminated via an intervening layer between the respective plate glasses, and 30 ° C. to 380 ° C. of the plate glass. The average linear expansion coefficient in the temperature range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and the softening point of the glass according to JIS R3103-1 (2001) is 830 ° C. or higher. The total thickness T of the laminated glass is 1.3 mm to 10 mm, and the total thickness S of the intervening layer is in the range of 30 to 60% of the total thickness T of the laminated glass.

Here, three or more plate glasses having a plate thickness of less than 1 mm are laminated glasses laminated between each plate glass through an intervening layer, and the average of the plate glasses in a temperature range of 30 ° C. to 380 ° C. The linear expansion coefficient is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and the softening point of the glass according to JIS R3103-1 (2001) is 830 ° C. or higher. The total thickness T is 1.3 mm to 10 mm, and the total thickness S of the intervening layer is in the range of 30% to 60% of the total thickness T of the laminated glass as follows. That is, a laminated glass obtained by laminating at least three thin glass plates made of inorganic glass having a thickness of less than 1 mm, and joining two or more intervening layers between the laminated plate glasses in parallel. In addition, the thermal performance exhibited by the glass material of the plate glass has an average linear expansion coefficient in the temperature range of 30 ° C. to 380 ° C. in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and When glass fiber with a circular cross-section of 0.65 mm in diameter and 235 mm in length is heated at a rate of 5 ± 1 K / min by a measuring method stipulated in JIS R3103-1 which is a Japanese industrial standard issued in 2001, glass The softening temperature (also called Littleton temperature) measured as the temperature at which the glass fiber stretches at a rate of 1 mm / min by its own weight is 830 ° C. or higher, and the laminated glass The body thickness dimension T is in the range of 1.3 mm to 10 mm, meaning that the total thickness dimension S of two or more intervening layers accounts for 30% to 60% of the total thickness dimension T of the laminated glass. ing. That is, when converted from the relationship between the total thickness T of the laminated glass of the present invention and the total thickness S of the two or more intervening layers, the total thickness S of the two or more intervening layers is in the range of 0.39 mm to 6.0 mm. It is what you have.

As described above, as for the performance of the plate glass, it is important that the average linear expansion coefficient in the temperature range of 30 ° C. to 380 ° C. is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K. is there. If the average linear expansion coefficient is larger than 50 × 10 ⁻⁷ / K when the glass is heated, it is heated when heated locally or when only one glass surface is heated. Since the difference in expansion between the unexposed portion and the heated portion becomes too large, the plate glass is damaged at the initial stage of heating, and the glass pieces are easily scattered around, which is not preferable for disaster prevention. Thus, it is important that the average linear expansion coefficient of the plate glass is 50 × 10 ⁻⁷ / K or less in the temperature range of 30 ° C. to 380 ° C. On the other hand, when the average linear expansion coefficient of the glass is made smaller than −1 × 10 ⁻⁷ / K, the glass to be used has a large negative expansion. This is not preferable because the crystallization process increases and causes a cost increase. Further, since a glass material having a small average linear expansion coefficient requires a large amount of energy for melting the glass raw material, it is more preferable to employ a plate glass having a higher expansion coefficient, thereby reducing costs. From such a viewpoint, the average linear thermal expansion coefficient for the temperature range of 30 ° C. to 380 ° C. is preferably in the range of 10 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and more preferably Is in the range of 30 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and most preferably in the range of 31 × 10 ⁻⁷ / K to 48 × 10 ⁻⁷ / K. Incidentally, the average linear expansion coefficient may be measured by a known thermal expansion measuring instrument calibrated with a standard sample having a known thermal expansion coefficient such as quartz glass.

  As for the softening point, by using a glass material having a value of 830 ° C. or higher by measurement according to JIS R3103-1 (2001), the glass surface heated in a fire or the like is not easily softened and deformed in the initial stage of heating, This is preferable because of its high stability. From such a viewpoint, the softening point is more preferably 840 ° C. or higher, and further preferably 850 ° C. or higher. In addition, if a material with a high softening point is adopted, it is certain that it will be thermally stable. However, a material with a high softening point will be expensive to manufacture, and the price of laminated glass will also be expensive. End up. For this reason, there is also an upper limit to the softening point, and the value is 1000 ° C. or less, and more preferably 995 ° C. or less.

  In addition, the heat-resistant laminated glass of the present invention has a configuration in which three or more sheet glasses of less than 1 mm are laminated, and each sheet glass is laminated via an intervening layer, and the sheet glass has an average linear expansion coefficient or softening as described above. In addition, since the thickness of one sheet glass is thin, the thermal energy easily propagates in the thickness direction of the sheet glass quickly, and the thermal characteristics of the glass due to the uneven temperature distribution. The structure is less likely to break. For example, in this laminated glass, heating is performed under the condition that the upper side of the plate glass is 700 ° C. and the lower side is 100 ° C. with the light-transmitting surface held horizontal to the ground, so that a temperature difference of 600 ° C. is generated. Even in such a case, it is confirmed that the glass is hardly broken because the thermal energy propagates in the laminated glass quickly. In addition, when the thickness of each glass sheet laminated more than 3 sheets exceeds 1 mm, the weight of the laminated glass becomes too heavy. However, it is not preferable because the workability and time may be required due to its workability.

  However, if the thickness of the plate glass is less than 0.3 mm, it becomes easy to bend easily. Therefore, it may be difficult to handle the plate glass having a large area during manufacture. Also, if the plate thickness is less than 0.3 mm, the influence of static electricity due to the charging of the plate glass surface is likely to appear in the deformation of the glass shape, which may cause troubles in the process such as conveyance, and it is necessary to take measures for that. Yes, manufacturing costs become expensive. When considering such a problem, the thickness of the plate glass is preferably 0.3 mm or more, more preferably 0.35 mm or more, and still more preferably 0.4 mm or more.

  Furthermore, the heat-resistant laminated glass of the present invention has a total thickness T of the laminated glass of 1.3 mm to 10 mm, and the total thickness S of the intervening layer is from 30% of the total thickness T of the laminated glass. Since it is in the range of 60%, in addition to the heat resistance performance, a sufficiently high mechanical strength performance can be exhibited. That is, when the total thickness S of the intervening layer is less than 30% of the total laminated glass thickness T, it may be difficult to achieve sufficient strength with respect to penetration resistance and the like. In addition, when the total thickness S of the intervening layer exceeds 60% of the total thickness T of the laminated glass, the thermal performance of the entire laminated glass may greatly depend on the thermal performance of the intervening layer. Even if it is limited, it may be difficult to achieve stable quality performance. If the total thickness T of the laminated glass is too small, a sufficiently high mechanical strength cannot be obtained. If the mechanical strength is important, the total thickness of the laminated glass is more preferably 3 mm or more. On the other hand, if the total thickness T of the laminated glass exceeds 10 mm, the weight of the entire laminated glass becomes too heavy, so that the labor for construction increases and the construction cost may become expensive, which is not preferable.

  The heat-resistant laminated glass of the present invention is not limited to a glass material as long as it satisfies the above-described thermal characteristics. That is, soda-lime glass, potassium-containing silicate glass, titanate glass, high moisture content glass, alkali-free glass, borosilicate glass, barium silicate glass, aluminosilicate glass, alkaline earth borate glass, etc. Can be used. However, among the above materials, alkali-free glass, borosilicate glass, barium silicate glass, aluminosilicate glass, and alkaline earth borate glass are particularly preferable as materials that reliably satisfy the conditions for the expansion coefficient and softening point. is there. Further, the plate glass may be subjected to chemical strengthening treatment such as ion exchange strengthening and physical strengthening treatment such as air cooling strengthening, and coloring components such as transition metal elements such as iron and titanium and metal colloids are expressed in ppm order from the ppm order. It is also possible to give various colors to the glass by containing it in the glass composition to the extent expressed by the mass% percentage display of the digit order.

  In addition to the above, the heat-resistant laminated glass of the present invention can be sufficiently used by using it as a window material for buildings or in-vehicles if the average linear transmittance of the light transmitting surface at a wavelength of 400 nm to 780 nm is 80% or more. High daylighting can be realized.

  Here, the average linear transmittance at a wavelength of 550 nm to 700 nm on the light transmitting surface is 80% or more. For the wavelength range of electromagnetic waves in the range of 5500 Å (angstrom) to 7500 相当 corresponding to visible light. When the average linear transmittance in the direction perpendicular to the surface is measured by a spectrophotometer, it means that the value is 80% or more.

  In addition to the above, the heat-resistant laminated glass of the present invention can employ a conventionally accumulated manufacturing method when forming a laminated structure if the intervening layer contains a resin, so that a precise structure can be easily formed. It can be obtained and is preferable.

  Here, the intervening layer contains a resin. The main component of the intervening layer is a plastic material, and an appropriate amount of other organic resin or inorganic material can be added as necessary. Represents.

  As the resin constituting the intervening layer, any resin can be adopted as long as it can realize the performance of the heat-resistant laminated glass of the present invention. Examples of resins that can be used include methacrylic resin (PMA), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), polybutylene terephthalate (PBT), and cellulose acetate (CA). ), Diallyl phthalate resin (DAP), urea resin (UP), polyvinyl butyral (PVB), polyvinyl formal (PVF), polyvinyl alcohol (PVAL), vinyl acetate resin (PVAc), ionomer (IO), polymethylpentene (TPX) ), Polyethylene (PE), ethylene vinyl acetate copolymer (EVA), melamine resin (MF), unsaturated polyester (UP), vinylidene chloride (PVDC), polysulfone (PSF), polyvinylidene fluoride (PV) F) perfluororesin, methacryl-styrene copolymer resin (MS), polyarate (PAR), polyallyl sulfone (PASF), polybutadiene (BR), polyether sulfone (PESF), polyether ether ketone (PEEK), An appropriate amount of polycarbonate (PC) can be used. Of these, polyvinyl butyral (PVB) and ethylene vinyl acetate copolymer (EVA) are particularly preferable for use in the present invention because they can easily form an intervening layer and have high transparency. It is.

  The method for forming the intervening layer may be a method of forming the intervening layer by filling a liquid glass serving as the intervening layer in advance between the glass plates held at predetermined intervals, or a plate-like or film-like intervening layer. The plate glass and the intervening layer may be joined by heating after the resin material to be sandwiched between the plate glasses is heated. In addition, when sandwiching a resin material that becomes a plate-like or film-like intervening layer between plate glasses, an adhesive is applied between the resin material and the plate glass, and then energy such as heating or UV irradiation is applied. A joining method may be adopted.

  In addition to the above, the heat-resistant laminated glass of the present invention can reduce the temperature rise caused by infrared rays if the average linear infrared transmittance at a wavelength of 780 nm to 1100 nm of the light transmitting surface is 70% or more. Since the temperature does not rise rapidly, high heat resistance can be realized, which is preferable.

  Here, the average linear infrared transmittance at a wavelength of 780 nm to 1100 nm on the translucent surface is 70% or more, with respect to a light beam having a wavelength range of 7800 Å (angstrom) to 11000 相当 corresponding to an infrared ray. When the average linear transmittance in the direction perpendicular to the light transmitting surface is measured by a spectrophotometer, it means that the value is 70% or more.

  Further, the average linear infrared transmittance at a wavelength of 780 nm to 1100 nm of the heat-resistant laminated glass of the present invention is lowered by being reflected on the outer surface of the laminated glass, so there is an upper limit value, and a substantial average The linear infrared transmittance is a value in the range from 70% to 93%.

  The average linear infrared transmittance at wavelengths from 780 nm to 1100 nm may be measured using a calibrated spectrophotometer having an infrared light source.

  The heat-resistant laminated glass structure of the present invention is characterized in that the above-mentioned heat-resistant laminated glass is fixed to a frame.

Here, the above-mentioned heat-resistant laminated glass is fixed to the frame is as follows. That is, three or more sheet glasses having a sheet thickness of less than 1 mm are laminated glasses laminated between each sheet glass through an intervening layer, and the average linear expansion of the sheet glass in a temperature range of 30 ° C. to 380 ° C. The coefficient is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and the softening point of the glass according to JIS R3103-1 (2001) is 830 ° C. or more, and the total thickness of the laminated glass T is 1.3 mm to 10 mm, the total thickness S of the intervening layer is in the range of 30% to 60% of the total thickness T of the laminated glass, and the light-transmissive surface has a substantially rectangular shape It represents that the side where at least one end face around the glass is in contact with the translucent surface is fixed to the frame.

  As for the method of fixing the heat-resistant laminated glass to the frame, it may be fixed by adhering to the frame with a resin material or the like. It may be fixed by doing. In addition, for fixing one side, it is not necessary to fix the entire one side, and only one part or only a specific part may be fixed at one part or a plurality of parts.

  About a frame, what is necessary is just to use the 1 or more material chosen from the group of a metal, glass, glass ceramics, a plastics, rubber | gum, rock, and wood.

  In addition to the above, the heat-resistant laminated glass structure of the present invention can be adjusted for transmittance and / or transmission as required, provided that a coating film is formed on at least one of the light-transmitting surfaces of the heat-resistant laminated glass. The hardness of the light surface can be brought into an appropriate state.

  A coating film is formed on at least one of the light-transmitting surfaces of the heat-resistant laminated glass. The surface of at least one of the two light-transmitting surfaces facing the plate thickness direction of the laminated glass is covered. It means that a coating (also called a thin film) is applied.

  Any configuration of the coating film can be adopted as long as it does not impair heat resistance, impact resistance, or significant translucency. For example, as an abdominal membrane, an infrared reflection film (or infrared cut filter), an antireflection film (also referred to as an AR coat), an antireflection film, a conductive film, an antistatic film, a low pass filter, a high pass filter, a band pass filter, a shielding film, A reinforcing film and a protective film can be used as needed. The thickness of the peritoneum and the number of laminated layers are not particularly limited.

Regarding the coating film, specific materials for the coating film include the following. For example, silica (SiO ₂ ), zirconia (ZrO ₂ ), alumina (Al ₂ O ₃ ), tantalum oxide (or tantala) (Ta ₂ O ₅ ), niobium oxide (Nb ₂ O ₅ ), lanthanum oxide (La ₂ O ₃₎ ), Yttrium oxide (Y ₂ O ₃ ), magnesium oxide (MgO), hafnium oxide (HfO ₂ ), chromium oxide (Cr ₂ O ₃ ), magnesium fluoride (MgF ₂ ), molybdenum oxide (MoO ₃ ), tungsten oxide (WO ₃ ), cerium oxide (CeO ₂ ), vanadium oxide (VO ₂ ), zirconium zirconium oxide (ZrTiO ₄ ), zinc sulfide (ZnS), cryolite (Na ₃ AlF ₆ ), thiolite (Na ₅ Al ₃ F1 ₄₎ ), yttrium fluoride (YF _3), calcium fluoride (CaF _2), aluminum fluoride (AlF _3), barium fluoride (BaF ₂ , Lithium fluoride (LiF), lanthanum fluoride (LaF _3), gadolinium fluoride (GdF _3), dysprosium fluoride (DyF _3), lead fluoride (PbF _3), strontium fluoride (SrF _2), Antimony-containing tin oxide (ATO) film, indium oxide-tin film (ITO film), SiO ₂ and Al ₂ O ₃ multilayer film, SiO x -TiO x multilayer film, SiO ₂ -Ta ₂ O ₅ multilayer film, SiO x- LaOx—TiOx series multilayer film, In ₂ O ₃ —Y ₂ O ₃ solid film, alumina solid film, metal thin film, colloidal particle dispersion film, polymethyl methacrylate film (PMMA film), polycarbonate film (PC film), A film having a composition such as a polystyrene film, a methyl methacrylate styrene copolymer film, or a polyacrylate film can be used.

  In addition, the coating film forming method is not particularly limited as long as predetermined surface accuracy and function can be realized and the cost required for the production is not hindered, and various methods may be adopted. For example, sputtering, vacuum deposition, thermal CVD, laser CVD, plasma CVD, molecular beam epitaxy (MBE), ion plating, laser ablation, metal organic chemical vapor deposition (MOCVD), etc. As a method for forming a coating film according to the present invention, a chemical vapor deposition method (or CVD method), a liquid phase growth method such as a sol-gel method, a spin coating or screen printing coating method, or a plating method is used. can do.

  Moreover, since the manufacturing method of the heat-resistant laminated glass structure of the present invention is to fix the end face of the above-mentioned heat-resistant laminated glass of the present invention to a frame, a highly versatile glass structure that can be applied to many buildings and can do.

(1) As described above, the heat-resistant laminated glass of the present invention is a laminated glass in which three or more sheet glasses having a sheet thickness of less than 1 mm are laminated via an intervening layer between the sheet glasses. The average linear expansion coefficient in the temperature range of 30 ° C. to 380 ° C. is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and conforms to JIS R3103-1 (2001) of the glass. The softening point is 830 ° C. or higher, the total thickness T of the laminated glass is 1.3 mm to 10 mm, and the total thickness S of the intervening layer is in the range of 30% to 60% of the total thickness T of the laminated glass. Therefore, it is a daylighting structure material not only excellent in mechanical strength performance such as impact resistance but also in heat resistance, and is a laminated glass having high versatility as a light-transmitting light-transmitting window.

  (2) Further, the heat-resistant laminated glass of the present invention has a high transmittance of visible light required as a window material if the average linear transmittance at a wavelength of 550 nm to 700 nm of the light transmitting surface is 80% or more. Can be used in many buildings.

  (3) Furthermore, in the heat-resistant laminated glass of the present invention, if the intervening layer contains a resin, various resin materials can be selected and used according to the application, and desired performance can be obtained. In this way, the thickness of the intervening layer and the material type can be designed.

  (4) The heat-resistant laminated glass of the present invention absorbs radiant heat such as fire and causes thermal cracking when the average linear infrared transmittance at a wavelength of 780 nm to 1100 nm of the light transmitting surface is 70% or more. It is difficult and is suitable as a window material having high heat resistance.

  (5) Since the glass structure of the present invention is obtained by fixing the heat-resistant laminated glass of the present invention to a frame, it is a window material for various buildings that require not only heat resistance but also high impact resistance. Can be incorporated by various methods.

  Below, the detail is demonstrated concretely about the heat resistant laminated glass of this invention, and the structure using this heat resistant laminated glass.

  FIG. 1 shows a perspective view of the heat-resistant laminated glass of the present invention. In the figure, 10 is a heat-resistant laminated glass, 20 is a sheet glass, 30 is an intervening layer between sheet glasses, 11 is an end surface of the heat-resistant laminated glass, 12 is a light-transmitting surface of the heat-resistant laminated glass, and 13 is an end surface and a light-transmitting surface of the heat-resistant laminated glass. , T represents the total thickness of the laminated glass, and S represents the total thickness of the intervening layers (where S is the sum Σ of the thicknesses of the individual intervening layers).

This heat-resistant laminated glass 10 is designed for a south-facing window material for a building for office and commercial facilities having a high floor of 15 floors or more, and has four sheets having a thickness dimension of 0.68 mm. The plate glass 20 is laminated, and the three intervening layers 30 are sandwiched between the plate glasses 20. The four glass sheets 20, SiO ₂ 63 wt% as represented by mass percentage of any composition in terms of oxide, Al ₂ O ₃ 16 wt%, B ₂ O ₃ 10 wt%, MO (M = Ca, Mg , Ba, Sr, Zn) It is composed of 11% by mass and has a material similar to a plate glass having an alkali-free composition employed in a liquid crystal display device or the like.

The average linear thermal expansion coefficient of the plate glass 20 shows a value of 32 × 10 ⁻⁷ / K in a temperature range of 30 ° C. to 380 ° C. by measuring with a calibrated dilatometer (linear thermal dilatometer). It is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K. Moreover, about the softening temperature of plate glass, when it measures by the measuring method prescribed | regulated to JIS R3103-1 (2001) which is Japanese Industrial Standard, it has a value of 990 degreeC and 830 degreeC or more. Further, this plate glass is produced by a downdraw molding method after melting and homogenizing a glass raw material prepared in advance, and is homogeneous and has a flat surface.

  Further, the resin constituting the intervening layer 30 is polyvinyl butyral (PVB), which is formed by preliminarily sandwiching a film-like polyvinyl butyral between the plate glasses 20, and by heating and pressurizing the laminated layer. It has been done. The thickness of each of the three intervening layers 30 sandwiched between the four gaps of the plate glass 20 is 0.51 mm. Therefore, the total thickness T of the heat-resistant laminated glass 10 is 4.25 mm and is in the range of 1.3 mm to 10 mm. The ratio of the total thickness dimension S of the intervening layer 30 to the total thickness T of the heat resistant laminated glass 10 is 36%, which is in the range of 30% to 60% of the total thickness T.

  Further, the transmittance of the heat-resistant laminated glass 10 is measured with a calibrated spectrophotometer, and the average linear transmittance from a wavelength of 550 nm to 700 nm on the light-transmitting surface is 88%, indicating 80% or more. Further, the average linear infrared transmittance at a wavelength of 780 nm to 1100 nm on the light transmitting surface is 78%, which is 70% or more.

  The end surface 11 of the heat-resistant laminated glass 10 is manufactured in a state in which a resin film having a size matched to the size of the light-transmitting surface 12 of the plate glass 20 in advance, that is, the size of 500 mm × 700 mm is sandwiched between the two plate glasses 20. Therefore, the surface has high flatness. Moreover, about the plate glass 20 located in the outermost surface of the heat-resistant laminated glass 10, 0.1 mm C chamfering is given to the side 13 of the heat-resistant laminated glass 10 corresponding to the boundary between the translucent surface 12 and the end surface 11. .

  Next, various tests conducted by using other heat-resistant laminated glass of the present invention will be described, and the heat resistance performance and light transmission performance of the heat-resistant laminated glass of the present invention will be clarified. Table 1 shows the glass used in the test and the test results.

In order to form the heat-resistant laminated glass of the present invention, first, non-alkali glass (glass cord OA-10) manufactured by Nippon Electric Glass Co., Ltd. was formed into a plate shape by a downdraw molding method so as to have a plate thickness of 0.7 mm. . The average linear thermal expansion coefficient of the plate glass 21 shows a value of 38 × 10 ⁻⁷ / K in a temperature range of 30 ° C. to 380 ° C. by measuring with a calibrated dilatometer (linear expansion coefficient meter). In the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K. Moreover, the softening point according to JISR3103-1 (2001) of the plate glass 21 is 950 degreeC, and is a value of 830 degreeC or more. Next, the obtained sheet glass of OA-10 is cut into dimensions necessary for evaluation, that is, a width of 750 mm and a height of 620 mm, and polyvinyl butyral (PVB) having different thicknesses has a thickness that satisfies the configuration of the present invention. A required number of sheets were sandwiched as a film-like resin material between the plate glasses so as to have dimensions, and were molded by a thermocompression bonding method.

  As an evaluation of the molded plate glass, first, in order to measure the transmittance curve for visible light and infrared light, processed with a glass plate cutting device so that the area of the translucent surface is 30 mm × 30 mm, A sample for measurement was obtained. About the translucent surface of this measurement sample, the spectral transmittance from 300 nm to 3100 nm was measured by using a spectrophotometer (Shimadzu Corporation UV-3100PC). Moreover, the transmittance | permeability value in the wavelength was measured about five points, wavelength 400nm, 550nm, 700nm of visible region, and wavelength 1000nm, 1500nm of infrared region.

  Moreover, about the heat resistance test of the heat-resistant laminated glass of the present invention, a glass plate is cut in a state having a large area so that one of the light-transmitting surfaces has a light-transmitting surface of 90 mm × 90 mm. It processed using the apparatus etc. and it was set as the test piece. The test piece was directly exposed to a flame for 120 seconds while holding a light-transmitting surface at a position about 5 cm from the tube tip of the oxygen flame burner, and an evaluation was conducted to investigate whether or not the glass was broken or peeled off. The presence or absence of peeling of the glass can be confirmed by visual observation, but a video image may be recorded for reconfirmation of the test and accurate measurement. The sample piece may be held using a holder such as a tongue having heat resistance. Also, in this test, there is a risk that glass pieces will scatter, so it is necessary to evaluate in a fireproof environment. And what was not recognized by the glass crack and peeling by this test was set as "(circle)" determination.

  Furthermore, regarding the fire prevention equipment test of the heat-resistant laminated glass of the present invention, the heat-resistant laminated glass of the present invention complies with the Ministry of Construction Notification No. 1400 on May 30, 2000 based on the provisions of Article 2, Item 9 of the Building Standard Law. In order to evaluate whether or not it has the performance as a “non-combustible material”, it is heated to 781 ° C. for 20 minutes so that it becomes a standard heating temperature curve according to ISO 834, and it is spread to the non-heating side during the heating time. Evaluated whether there is any. If the performance as “natural material” can be confirmed by this evaluation, it was determined as “◯”.

As a result of the series of evaluations described above, as can be seen from Table 1, the sample No. corresponding to the example of the present invention was obtained. For No. 1, six sheet glasses made of non-alkali glass made of OA-10 are laminated as five intermediate layers of PVB film having a thickness of 0.38 mm, and the total thickness of the intermediate layer S is 1.90 mm, which corresponds to 31.1% with respect to 6.10 mm of the thickness dimension T of the heat-resistant laminated glass. And since it is such a structure, the mass per 1 m < ² > of the translucent surface is as small as 12 kg, and has sufficient lightness.

  In addition, this sample No. The visible transmittance of the translucent surface for No. 1 was 90.0% at 550 nm and 90.4% at 700 nm, and the average linear transmittance was 90%. Also in the infrared region, the transmittance of the translucent surface is 89.7% at 1000 nm, 75.3% at 1500 nm, and the average linear infrared transmittance from 780 nm to 1100 nm is 90%, which is satisfactory. It turned out to be a value. Sample No. FIG. 2 shows the entire transmission curve of visible region 1 and infrared region 1. From the spectral transmittance curve with respect to the wavelength in FIG. It is clear that 1 has a very high transmission value.

In addition, sample No. which is an example of the present invention. 2 is a laminate of 4 sheets of OA-10 plate glass as an intervening layer and 3 sheets of PVB film material having a thickness of 0.76 mm, and the total thickness dimension S of the intervening layer is 2.88 mm, This corresponds to 44.9% with respect to 5.08 mm of the thickness dimension T of the heat-resistant laminated glass. And since the total thickness T of a laminated glass is a thin laminated structure, the mass per 1 m < ² > of the translucent surface is 9 kg, and has high lightweight property. In addition, this sample No. The visible transmittance of the light-transmitting surface for No. 2 was 91.3% at 550 nm and 91.7% at 700 nm, and the average linear transmittance was 91%. Also in the infrared region, the transmittance of the light transmitting surface is 90.5% at 1000 nm, 74.9% at 1500 nm, and the average linear infrared transmittance from 780 nm to 1100 nm is 91%, which is quite high. It turned out to be a value. Sample No. Regarding the transmittance curve in the visible region and the infrared region with respect to 2, the spectral transmittance curve from 300 nm to around 2800 nm is shown in FIG. From the spectral transmittance curve with respect to the wavelength in FIG. It is clear that 2 shows a very high transmission value.

In addition, sample No. corresponding to the embodiment of the present invention. 3 is a laminate of 4 sheets of OA-10 material sheet glass with 4 layers of PVB film material having a thickness of 0.76 mm, and the total thickness dimension S of the intervening layer is 3.04 mm. This corresponds to 46.5% with respect to 6.54 mm of the thickness dimension T of the heat-resistant laminated glass. And since this laminated glass is a slightly thin laminated structure, the mass per 1 m < ² > of the translucent surface is 12 kg, and has a slightly high lightness. In addition, this sample No. The visible transmittance of the translucent surface for No. 3 was 90.1% at 550 nm and 90.5% at 700 nm, and the average linear transmittance was 90%. Also in the infrared region, the transmittance of the translucent surface is 90.2% at 1000 nm, 70.2% at 1500 nm, and the average linear infrared transmittance from 780 nm to 1100 nm is 91%, which is satisfactory. It turned out to be high. Sample No. The visible region and infrared region transmittance curves for No. 3 are shown in FIG. 2 as in the other examples. In FIG. The spectral transmittance curve showing the transition of the transmittance with respect to the wavelength of 3 shows a sufficiently high transmittance value.

In addition, sample No. corresponding to the embodiment of the present invention. 4 is a laminate of 6 sheets of OA-10 material sheet glass with 5 layers of PVB film material having a thickness of 0.76 mm, and the total thickness dimension S of the intermediate layer is 3.80 mm. This corresponds to 47.5% with respect to 8.00 mm of the thickness dimension T of the heat-resistant laminated glass. And since it is such a laminated structure, the mass per 1 m < ² > of the translucent surface is 15 kg, and it has sufficient lightness. In addition, this sample No. The visible transmittance of the light-transmitting surface for No. 4 was 88.9% at 550 nm and 90.0% at 700 nm, and the average linear transmittance was 89%. Also in the infrared region, the transmittance of the light-transmitting surface is 87.7% at 1000 nm, 63.5% at 1500 nm, and the average linear infrared transmittance from 780 nm to 1100 nm is 88%, which is satisfactory. It turned out to be a value. Sample No. For the transmittance curve in the visible region and the infrared region for No. 4, FIG. From the graph of transmittance with respect to the wavelength in FIG. It is clear that 4 shows a high transmittance value.

  Further, this sample No. For No. 4, a heat resistance test and a fire prevention equipment test were conducted. First, regarding the heat resistance test, the following facts could be confirmed by verification by video recording. PVB used for the intervening layer starts to foam in 0.54 seconds from the start of heating by the oxygen flame burner, and starts to blacken after 10 seconds. And after 82 seconds from the start of heating, the heat-resistant laminated glass is in a state where the blackened carbon of PVB coats the glass surface, but the glass is not damaged and peeling does not occur after 120 seconds. It was found to be in a state having high durability and judged as “◯”.

Also, for the fire prevention equipment test, as described above, according to ISO834, the temperature rise curve is raised along a curve according to 345 × log ₁₀ (8t + 1) +20 as a function of time t (minutes), and heating up to 781 ° C. is performed. Although it took 20 minutes, it does not spread to the non-heated side during the heating period of 20 minutes, and it has the performance as a “non-combustible material”, and confirm that it becomes “◯” judgment. I was able to.

On the other hand, sample No. which is a comparative example of the present invention. 101 is a laminated glass in which two commercially available 3 mm thick soda lime plate glass (average linear expansion coefficient is 98 × 10 ⁻⁷ / K) sandwiched between 0.76 mm thick PVB intervening layers, The ratio of the total thickness dimension S of the intervening layer to the total thickness T of the laminated glass T of 6.76 mm is 11.2%, and further satisfies the requirements of the present invention because the sheet glass is composed of only two sheets. Not done. Therefore, it can be expected that it is difficult to realize high heat resistance. A heat resistance test according to the same specifications as in No. 4 was performed. As a result, sample no. For 101, the glass broke after 5 seconds from the start of heating with the oxygen flame burner, and the broken glass piece peeled off after 40 seconds from the start of heating. Then, after a further 80 seconds, only one sheet, which was originally a laminated glass composed of two sheet glasses, remained. Thus, it was not possible to assume that the glass piece would not peel off in 120 seconds after heating, and the judgment was “x”.

  Sample No. For 101, the visible transmittance of the translucent surface was 87.8% at 550 nm and 83.1% at 700 nm, and the average linear transmittance was 83%. In the infrared region, the transmittance of the light transmitting surface is 73.0% at 1000 nm and 68.7% at 1500 nm, and the average linear infrared transmittance from 780 nm to 1100 nm is 67%, and the visible region. Although the transmittance of was high, it was less than 70% in the infrared region.

  Furthermore, sample no. For sample 102, sample no. Similar to 101, two commercially available soda lime plate glasses with a thickness of 3 mm were laminated. The only difference from 101 is that the PVB thickness of the intervening layer is 1.52 mm, but this sample has only two plate glasses and the total thickness S of the intervening layer is matched. The ratio to the total thickness T of the glass is 20.2%, which is less than 30%, and does not satisfy the requirements of the present invention. As in the case of 101, it is possible to expect a problem in heat resistance.

  Sample No. 103 is a commercially available laminated glass, but the configuration uses two pieces of 3 mm thick soda lime plate glass, and a thickness of 1.2 mm at the center of each 0.5 mm thick intervening layer made of EVA. In this structure, a polycarbonate (PC) plate is interposed. This sample No. The structure 103 does not satisfy the requirements of the present invention. That is, only two plate glasses are used, and the total thickness dimension S of the intervening layer is 1.00 mm, but the ratio of the total thickness dimension S to the total thickness T of the laminated glass is as low as 13.3%. These two points are completely different from the present invention.

  From the above series of evaluations, it became clear that the heat-resistant laminated glass of the present invention has a structure that is sufficiently light and has high heat resistance.

  What uses the heat-resistant laminated glass of this invention as an example of the heat-resistant laminated glass structure of this invention is demonstrated below. A perspective view of the heat-resistant laminated glass of the present invention is shown in FIG. In FIG. 3, 100 is a heat-resistant laminated glass structure, 11 is an end face of the heat-resistant laminated glass, 12 is a light-transmitting surface of the heat-resistant laminated glass, 13 is a side of the heat-resistant laminated glass, 21 is a plate glass, 31 is an intervening layer, and 40 is Each frame is shown.

  This heat-resistant laminated glass structure 100 is a rectangular heat-resistant laminated structure having a structure in which three sheets of 0.7 mm OA-21 non-alkali composition sheet glass are used as an intervening layer and laminated with two 0.6 mm-thick PVB films. The glass end face 11 and the four sides 13 are covered with an aluminum frame.

Incidentally, the average linear thermal expansion coefficient of the plate glass 21 constituting the heat-resistant laminated glass structure 100 is 32 × 10 in a temperature range of 30 ° C. to 380 ° C. by measuring with a calibrated dilatometer (linear expansion coefficient). ^-7 / K, which is in the range of -1 × 10 ^-7 / K to 50 × 10 ^-7 / K. And the softening point according to JISR3103-1 (2001) of this plate glass 21 is 990 degreeC, and has become the value of 830 degreeC or more.

  The total thickness of the intervening layer is 1.2 mm, and has a ratio of 30.8% to the total thickness of 3.9 mm of the laminated glass. The four sides 13 of the heat-resistant laminated glass structure 100 and the light-transmitting surface 12 of the heat-resistant laminated glass 100 are in contact with each other so that there is almost no step. Even if this heat-resistant laminated glass structure 100 is used for a high-rise building, it is lightweight, so it does not require a large amount of labor for installation, and it has excellent heat resistance in addition to high strength. Therefore, it is optimal for locations that are particularly conscious of fire resistance.

The perspective view of the heat-resistant laminated glass of this invention. The figure which shows the spectral transmittance curve with respect to the wavelength of the heat-resistant laminated glass of this invention. The perspective view of the heat-resistant laminated glass structure of this invention.

Explanation of symbols

10, 100 Heat-resistant laminated glass 11 of the present invention End face 12 of heat-resistant laminated glass Translucent surface 13 of heat-resistant laminated glass Sides 20 and 21 of heat-resistant laminated glass Plate glass 30 and 31 Intervening layer 40 Frame T Total thickness of laminated glass S Intervening layer Total thickness

Claims (5)

Three or more plate glasses having a plate thickness of less than 1 mm are laminated glass laminated between each plate glass via an intervening layer,
The average linear expansion coefficient in the temperature range of 30 ° C. to 380 ° C. of the plate glass is in the range of −1 × 10 ⁻⁷ / K to 50 × 10 ⁻⁷ / K, and JIS R3103-1 (2001) ) Has a softening point of 830 ° C. or higher,
A heat resistant laminated glass, wherein the total thickness T of the laminated glass is 1.3 mm to 10 mm, and the total thickness S of the intervening layer is in the range of 30% to 60% of the total thickness T of the laminated glass.   2. The heat-resistant laminated glass according to claim 1, wherein an average linear transmittance at a wavelength of 550 nm to 700 nm on the light transmitting surface is 80% or more.   The heat-resistant laminated glass according to claim 1 or 2, wherein the intervening layer contains a resin.   The heat-resistant laminated glass according to any one of claims 1 to 3, wherein an average linear infrared transmittance at a wavelength of 780 nm to 1100 nm of the light transmitting surface is 70% or more.   A heat-resistant laminated glass structure, wherein the heat-resistant laminated glass according to any one of claims 1 to 4 is fixed to a frame.

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